TclPrintDouble(3) Tcl Library Procedures TclPrintDouble(3)

NAME
       TclPrintDouble - Convert floating value to string

SYNOPSIS
       ##iinncclluuddee <>

       TTccllPPrriinnttDDoouubbllee(interp, value, dst)

AARRGGUUMMEENNTTSS
       TclInterp   *interp   (in)      Before   Tcl  8.0,  the  ttccllpprreecciissiioonn |
                                        variable  in  this  interpreter   con- |
                                        trolled  the  conversion.   As  of Tcl |
                                        8.0, this argument is ignored and  the |
                                        conversion   is   controlled   by  the |
                                        ttccllpprreecciissiioonn  variable  that  is  now |
                                        shared by all interpreters.

       double       value     (in)      Floating-point  value to be converted.

       char         *dst      (out)     Where  to  store  string  representing
                                        value.   Must  have  at least TCLDOU-
                                        BLESPACE characters of storage.



DESCRIPTION
       TTccllPPrriinnttDDoouubbllee generates a string that represents the value  of  value
       and  stores it in memory at the location given by dst.  It uses %%gg for-
       mat to generate the string, with one special twist: the string is guar-
       anteed  to  contain  either a ``.'' or an ``e'' so that it doesn't look
       like an integer.  Where %%gg would generate an integer  with  no  decimal
       point, TTccllPPrriinnttDDoouubbllee adds ``.0''.


KKEEYYWWOORRDDSS
       conversion, double-precision, floating-point, string



Tcl                                   8.0                   TclPrintDouble(3)